RGBCube/serenity
1
Fork 0
mirror of https://github.com/RGBCube/serenity synced 2025-07-25 15:37:46 +00:00
Code Issues Activity Actions

Kernel: Add Mailbox::set_clock_rate()

Browse source
This commit is contained in:
Nico Weber 2021-09-25 23:28:50 -04:00 • committed by Brian Gianforcaro
parent 43d378940f
commit 44c787e88b
2 changed files with 39 additions and 0 deletions
Download patch file Download diff file Expand all files Collapse all files

20
Kernel/Prekernel/Arch/aarch64/Mailbox.cpp
View file

@ -75,6 +75,7 @@ bool Mailbox::call(u8 channel, u32 volatile* __attribute__((aligned(16))) messag
}
constexpr u32 MBOX_TAG_GET_FIRMWARE_VERSION = 0x0000'0001;
constexpr u32 MBOX_TAG_SET_CLOCK_RATE = 0x0003'8002;
u32 Mailbox::query_firmware_version()
{
@ -96,4 +97,23 @@ u32 Mailbox::query_firmware_version()
return 0xffff'ffff;
}
u32 Mailbox::set_clock_rate(ClockID clock_id, u32 rate_hz, bool skip_setting_turbo)
{
u32 __attribute__((aligned(16))) message[9];
message[0] = sizeof(message);
message[1] = MBOX_REQUEST;
message[2] = MBOX_TAG_SET_CLOCK_RATE;
message[3] = 12; // Tag data size.
message[4] = MBOX_REQUEST;
message[5] = static_cast<u32>(clock_id);
message[6] = rate_hz;
message[7] = skip_setting_turbo ? 1 : 0;
message[8] = 0;
call(ARM_TO_VIDEOCORE_CHANNEL, message);
return message[6];
}
}

19
Kernel/Prekernel/Arch/aarch64/Mailbox.h
View file

@ -17,6 +17,25 @@ public:
static bool call(u8 channel, u32 volatile* __attribute__((aligned(16))) data);
static u32 query_firmware_version();
enum class ClockID {
Reserved = 0,
EMMC = 1,
UART = 2,
ARM = 3,
CORE = 4,
V3D = 5,
H264 = 6,
ISP = 7,
SDRAM = 8,
PIXEL = 9,
PWM = 10,
HEVC = 11,
EMMC2 = 12,
M2MC = 13,
PIXEL_BVB = 14,
};
static u32 set_clock_rate(ClockID, u32 rate_hz, bool skip_setting_turbo = true);
};
}